含锆沥青制备工艺条件和性能的研究

Studies on the preparation process and properties of zirconium-containing pitch

针对目前常用的掺杂法制备含锆炭基复合材料方法中存在的缺点,从制备炭材料的基本原料沥青入手,制备锆精细分布的含锆沥青。实验采用煤沥青和氯化锆为原料进行化学反应合成了含锆沥青。通过工艺条件对沥青性能的影响分析,考察了含锆沥青软化点随ZrCl4添加量和反应时间的变化趋势,以及工艺条件对沥青族组成的影响。以溶解性实验得到的族组成数据为基础,初步研究、分析了沥青中锆的存在形态,并对锆以物理或化学形态存在的可能性做了推断。在进一步的粘度和温度关系、族组成分配比例等实验结果的支持下,对含锆沥青的用途进行了初步分析,认为含锆沥青可望作为浸渍剂和粘结剂在含锆炭基复合材料中得到应用。

Fine grain zirconium containing pitch was prepared by the chemical reaction of zirconium chloride with coal tar pitch having a softening point of 68?℃. The effects of the amount of ZrCl_4, reaction time on softening point and dissolved fractions in toluene, pyridine and quinoline were investigated as preliminary work for the formation of zirconium/carbon composites. Based on dissolving experiments and energy dispersive spectrometry (EDS), the physical and chemical forms of zirconium in pitch were deduced. Possible applications of zirconium containing pitch as an impregnating agent and binder for zirconium/carbon composites were suggested.